How to change file's timestamp?

[Brad Bonkoski]

man touch
 (and for the date, man date)
-B

Hongwei Li wrote:
> Hi,
>
> I need to write a script to change a file's timestamp. I have this script mytmp:
>
> #!/bin/sh
> cd /tmp/test
> touch t1
>
> Then, if I run mytmp, file t1 is created with the current timestamp.  How to
> change its timestamp in the script after it is created to a specific date and
> time? If I want to set the date and time as an argument, e.g. I change the
> script as:
>
> #!/bin/sh
> newstmp=$1
> cd /tmp/test
> touch t1
>
> and run it as
>
> # mytmp "Tue Aug 22 08:30:00 CDT 2006"
>
> What should be added in the script to change t1's timestamp to the argument
> provided?
>
> Thanks!
>
> Hongwei Li
>
>